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Glossary Scalp Thickness

combined depth of skin and tissue layers on the head

Scalp thickness refers to the combined depth of the skin, subcutaneous tissue, and other layers that make up the scalp. It can vary between individuals and different areas of the scalp, typically ranging from 5 to 8 millimeters. Understanding scalp thickness is important for medical professionals when performing procedures like hair transplants or scalp surgeries, as it affects the approach and techniques used.

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research Enhancing Lower Extremity Defect Coverage: High Viability Ultra-Thin Split-Thickness Skin Grafts Obtained from the Scalp

2 citations , September 2023 in “Journal of clinical medicine”

This study found that using autologous ultra-thin split-thickness skin grafts from the scalp with the DermaBlade tool led to rapid wound healing, minimal complications, and improved cosmetic outcomes for 90% of patients with lower extremity lesions, without causing scarring or alopecia.

A 2% Oleosome-FGF-2 Fusion Extract Scalp Serum Improves Hair Density, Anagen/Telogen Ratio, Hair Shaft Thickness, and Scalp Barrier in Women with Shedding-Prone Hair: A Randomized, Single-Blind, Placebo-Controlled Pilot Study

research A 2% Oleosome-FGF-2 Fusion Extract Scalp Serum Improves Photo-trichogramDerived Hair Density, Anagen/Telogen Ratio, Hair Shaft Thickness, and Scalp Barrier Parameters in Women with Shedding-Prone Hair: A Randomized, SingleBlind, Placebo-Controlled Pilot Study

July 2026 in “International Journal of Clinical & Experimental Dermatology”

This exploratory pilot study reported that using a 2% Oleosome-FGF-2 fusion extract scalp serum twice daily for 84 days in women with telogen effluvium and brittle hair improved hair density, anagen/telogen ratio, hair shaft thickness, and scalp hydration compared to a placebo.

research Safety and efficacy of hairy scalp donors in thick split-thickness skin grafting: Healing and complications at donor sites

2 citations , December 2024 in “JPRAS Open”

In this study, patients experienced scarless regenerative healing of scalp donor wounds, and the researchers highlighted that proper wound dressing can prevent alopecia and scarring in infected wounds, suggesting the potential of scalp skin grafts for optimal healing.

A Clinical Study to Evaluate the Effectiveness of Rosmarinus Officinalis Mother Tincture in Improving Hair Volume and Density in Patients with Diffuse Cyclical Hair Loss Through Hair Shedding Visual Scale and Ponytail Thickness Test

research A Clinical Study to Evaluate Effectiveness of Rosmarinus officinalis Mother Tincture in Improving Hair Volume and Density in Patients with Diffuse Cyclical Hair Loss Through Hair Shedding Visual Scale and Ponytail Thickness Test

March 2026 in “International Journal of Research and Review”

This clinical study found that Rosmarinum officinalis mother tincture significantly improved hair volume and density in individuals with diffuse hair loss by enhancing hair parameters measured through a hair shedding visual scale and ponytail thickness test.

Sonographic Comparison of Subcutaneous Fat Layer Thickness in the Scalp Area in Patients with Androgenetic Alopecia Compared to Healthy Individuals: Cross-Sectional

research Sonographic comparison of subcutaneous fat layer thickness in the scalp area in patients with androgenetic alopecia compared to healthy individuals: Cross‐sectional

1 citations , July 2024 in “Skin Research and Technology”

In this study, the researchers compared subcutaneous fat in the frontal and occipital scalp regions, which are affected and spared in androgenetic alopecia respectively, to better understand the role of subcutaneous fat in the condition's pathogenesis.

research RETRACTION: Sonographic Comparison of Subcutaneous Fat Layer Thickness in the Scalp Area in Patients With Androgenetic Alopecia Compared to Healthy Individuals: Cross‐Sectional

September 2025 in “Skin Research and Technology”

research Hair loss in older women: supplement to increase scalp hair thickness and reduce hair loss

January 2017 in “Nutrafoods - International Journal on Nutraceuticals, Functional Foods and Novel Foods”

This study found that a dietary supplement containing fermented soy, ornithine, arginine, and Tricovel® Tricoage45+ significantly reduced hair loss and promoted hair growth in menopausal women after 8 to 12 weeks.

Trichoscopy in the Healthy Female: Method Standardization and Norms for Measurable Parameters

research Trichoscopy (hair and scalp videodermoscopy) in the healthy female. Method standardization and norms for measurable parameters

46 citations , April 2009 in “Journal of Dermatological Case Reports”

This study established standard trichoscopy norms for adult white females, providing benchmarks for hair thickness, percentage of thin hairs, and pilosebaceous units with single hair across different scalp areas.

research Autologous Micrografts from Scalp Tissue: Trichoscopic and Long-Term Clinical Evaluation in Male and Female Androgenetic Alopecia

41 citations , January 2020 in “BioMed Research International”

This study found that micrografts containing human hair follicle mesenchymal stem cells significantly increased hair count and density compared to placebo over 58 weeks in patients experiencing hair loss.

research Phototrichogram analysis of normal scalp hair characteristics with aging

16 citations , November 2013 in “European Journal of Dermatology”

In this study, researchers characterized the normal scalp hair properties in South Koreans, observing that hair density declined with age and varied across scalp sites, while hair thickness patterns remained relatively stable until later in life.

research Significant relationship between temporal hair loss and other scalp areas in female pattern hair loss

5 citations , January 2020 in “Journal of Dermatology”

This study found that temporal hair loss is evident in Korean women with female pattern hair loss, suggesting it should be included in classification systems like the BASP.

research Synergistic effect of platelet-rich plasma injections and scalp lifting in androgenetic alopecia

5 citations , March 2018 in “Clinics in Dermatology”

This study found that combined platelet-rich plasma injections and suture embedding significantly improved scalp thickness, blood flow, and hair diameter in patients with androgenetic alopecia.

research High‐frequency ultrasonography of the scalp: A comparison between androgenetic alopecia and healthy volunteers

1 citations , July 2024 in “Skin Research and Technology”

This study found that patients with androgenetic alopecia had thinner scalp and subcutaneous tissues, narrower and shorter hair follicles, a lower hair follicle count, and fewer color flow signals compared to healthy volunteers, as measured by 22 MHz ultrasound.

The Scalp as a Donor Site in Pediatric Burns: Systematic Review and Management Algorithm Proposal

research The Scalp as a Donor Site in Pediatric Burns: Systematic Review of the Literature and Proposal of a Management Algorithm

May 2026 in “European Burn Journal”

This systematic review concluded that the scalp can be a safe and effective donor site for split-thickness skin grafts in pediatric burn patients, with evidence indicating good scar quality and manageable complications, though a rigorous technique is essential to minimize risks.

research Excessive hair loss in women. Evaluation of scalp therapy using injectable platelet-rich fibrin

December 2025 in “Aesthetic Cosmetology and Medicine”

This study reported that platelet-rich fibrin (iPRF) therapy may improve scalp health and hair appearance in women, showing beneficial changes in scalp hydration, redness, oiliness, and hair density, thickness, and loss.

Rosmagain as a Natural Therapeutic for Hair Regrowth and Scalp Health: A Double-Blind, Randomized, Three-Armed, Placebo-Controlled Clinical Trial

research Rosmagain™ as a Natural Therapeutic for Hair Regrowth and Scalp Health: A Double-Blind, Randomized, Three-Armed, Placebo-Controlled Clinical Trial

June 2025 in “Cureus”

In this clinical trial, rosemary-lavender and rosemary-castor oils were found to significantly improve hair growth rate, thickness, density, length, and reduce hair fall compared to coconut oil over 90 days, indicating they may be effective natural alternatives for hair regrowth.

Evaluation of the Efficacy and Safety of Narasimham Hair Oil in Promoting Hair Regrowth and Scalp Health: A Prospective Open-Label Clinical Study

research Evaluation of the efficacy and safety of Narasimham hair oil in promoting hair regrowth and scalp health: A prospective open-label clinical study

May 2025 in “International Journal of Biological and Pharmaceutical Sciences Archive”

In an open-label clinical trial, this study found that applying Narasimham Hair Oil thrice weekly for 8 weeks significantly improved hair density, thickness, and scalp health among participants with hair thinning, with benefits persisting after treatment, and 95% reporting user satisfaction without adverse effects.

Revitalizing Effect on the Scalp After Injection with a Mechanically Stabilized Hyaluronic Acid Complex in Subjects with Androgenetic Alopecia

research Revitalizing Effect on the Scalp After Injection with a Mechanically Stabilized Hyaluronic Acid Complex in Subjects with Androgenetic Alopecia

November 2024 in “Journal of Clinical Medicine”

This study observed that six sessions of injections using a stabilized hyaluronic acid compound improved hair thickness, shine, density, and reduced hair loss in volunteers with moderate androgenetic alopecia, with excellent treatment tolerability and high satisfaction reported by 88.5% of participants.

research The Effects of Cheonggukjang Diet on the Scalp Hair of Middle-aged Women Aged 40~60s

April 2021 in “Han'gug miyong haghoeji/Journal of the Korean society of cosmetology”

This study found that consuming raw cheonggukjang improved various measures of scalp hair condition in middle-aged women over a 12-week period.

research P077 : Effect of low-level light therapy on hair growth and scalp

January 2020 in “프로그램북(구 초록집)”

This study found that using a low-level light therapy helmet device daily for 24 weeks improved hair density and thickness among participants, though it did not significantly impact sebum secretion or erythema index.

research Lipedematous Scalp Occurring in Two Female Siblings: Further Evidence for a Genetic Role

2 citations , November 2023 in “Skin Appendage Disorders”

This case report documents the rare occurrence of lipedematous scalp in two black Caribbean female siblings, suggesting a potential genetic factor and noting psychiatric co-morbidities as novel associations.

research A cross-sectional study of clinical, dermoscopic, histopathological, and molecular patterns of scalp melanoma in patients with or without androgenetic alopecia

September 2022 in “Scientific Reports”

This study found that scalp melanoma often occurs in areas with androgenetic alopecia, and patients without alopecia might experience a later diagnosis due to hair coverage, leading to potentially worse outcomes.

research Scalp melanoma: Distinctive high risk clinical and histological features

37 citations , January 2016 in “Australasian Journal of Dermatology”

This study observed that scalp melanomas in older men often grow rapidly, appear without pigment, and have more aggressive features compared to other head and neck melanomas.

research Hair care practices and structural evaluation of scalp and hair shaft parameters in African American and Caucasian women

25 citations , August 2015 in “Journal of cosmetic dermatology”

This study observed significant differences in hair care practices and biologic hair parameters between Caucasian and African American women, which may contribute to varying hair fragility and growth.

research Preliminary results of the use of scalp microneedling in different types of alopecia

24 citations , June 2019 in “Journal of Cosmetic Dermatology”

This study found that microneedling improved hair density and thickness with minimal side effects in patients with androgenetic alopecia and telogen effluvium.

research Aggressive Squamous Carcinomas of the Scalp

18 citations , September 2006 in “Dermatologic Surgery”

This study reported that squamous cell carcinomas of the scalp can become extraordinarily aggressive, highlighting the need for early diagnosis and careful use of treatment strategies like wide excision and radiation therapy.

research An Assessment of the Safety, Efficacy, and Tolerability of a Novel Scalp Treatment Regimen Combining a Hydroxy Acid-Based Scrub and Copper Tripeptide Serum in the Management of Seborrheic Dermatitis in Adults

4 citations , September 2024 in “Cureus”

In this study, using a 15-day regimen combining a scalp scrub and serum significantly improved dandruff and scalp health in participants, reducing flaking, increasing hair density and thickness, and enhancing hydration and overall scalp appearance.

The Role of Autologous Micrografts Injection from Scalp Tissue in the Treatment of COVID-19 Associated Telogen Effluvium: Clinical and Trichoscopic Evaluation

research The role of autologous micrografts injection from the scalp tissue in the treatment of COVID‐19 associated telogen effluvium: Clinical and trichoscopic evaluation

4 citations , April 2022 in “Dermatologic Therapy”

This study found that using autologous micrografts from scalp tissues significantly improved hair thickness and density in patients experiencing telogen effluvium following COVID-19, with notable improvements observed over a 6-month follow-up period.

research Outcomes of Tissue Expander Application for Scalp Reconstruction in Extensive Aplasia Cutis Congenita

4 citations , November 2015 in “Aesthetic Plastic Surgery”

Using tissue expanders for scalp reconstruction in patients with extensive Aplasia Cutis Congenita is effective and has minimal complications.

research Fibonacci sequence ‘snail’ flap versus skin grafts in scalp reconstruction: a comparative study

2 citations , February 2021 in “European Journal of Plastic Surgery”

This study found that the Fibonacci 'snail' flap for scalp defect reconstruction healed faster and resulted in better aesthetic outcomes than skin grafts, though not all complication rate differences were statistically significant.